US4576525A - Method and equipment for performing rock bolting - Google Patents

Method and equipment for performing rock bolting Download PDF

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Publication number
US4576525A
US4576525A US06/583,023 US58302384A US4576525A US 4576525 A US4576525 A US 4576525A US 58302384 A US58302384 A US 58302384A US 4576525 A US4576525 A US 4576525A
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US
United States
Prior art keywords
drill hole
bolt
capsules
hole
guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/583,023
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English (en)
Inventor
Onni Issakainen
Pertti Heikkila
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tampella Oy AB
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Tampella Oy AB
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Filing date
Publication date
Application filed by Tampella Oy AB filed Critical Tampella Oy AB
Assigned to OY TAMPELLA AB reassignment OY TAMPELLA AB ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HEIKKILA, PERTTI, ISSAKAINEN, ONNI
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Publication of US4576525A publication Critical patent/US4576525A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole

Definitions

  • the present invention concerns a method for performing rock bolting, according to which method a cementing agent is fed into a drill hole drilled into the rock, whereupon a bolt or equivalent is fitted into the drill hole for supoorting the rock.
  • the rapidly hardening concrete can be prepared for one or two drill holes only at a time.
  • the rapidly hardening concrete hardens excessively before it can be used. Because of this that the method cannot be mechanized. Equipment used for feeding the rapidly hardening concrete becomes unusable in a short time, because the hardening concrete blocks the pipe system and the feeding pump. Moreover, such a concrete, however, hardens too slowly to permit preliminary tensioning of the bolt immediately upon installation of the bolt.
  • a further object of the invention is to provide a method by means of which it is possible to make use of the advantages of a rapidly hardening cementing agent even when long bolts are being installed.
  • this is accomplished by using for fixing of the tip portion of the bolt capsules containing a rapidly hardening two-component agent, one or several such capsules being fed to the bottom of the drill hole, and by filling the required part of the remaining drill hole with ordinary slowly hardening concrete or with any other suitable cementing and/or corrosion-inhibiting agent, whereby, when the bolt is inserted into the hole, the two-component capsules are mixed to a rapidly hardening cementing agent and fasten the bolt tip, and the concrete or equivalent is hardened in the course of time less rapidly, fastening the rest of the bolt and protecting the bolt against the effects of corrosion.
  • the invention is characterized in that a number, chosen on the basis of the requirement, of capsules are fed to the bottom of the drill hole, which capsules contain preferably two-component cementing agent which hardens rapidly when the components are mixed together, and that a conventional cementing agent hardening slowly and/or protecting the bolt against corrosion is fed into the possible remaining portion of the drill hole by means of a feeding pipe in itself known.
  • This method can also be mechanized in a simple way, because no premature hardening of the rapid cementing agent takes place in the equipment and the rapid cementing agent is not formed until in the drill hole, where its hardening is desirable.
  • the present invention also concerns an equipment for carrying out the method, and the equipment is characterized by the features according to claim 6.
  • the equipment is characterized by the features according to claim 6.
  • FIG. 1 is a side view of an equipment in accordance with the invention partly as an axial section
  • FIGS. 2A to 2F are schematical illustrations of different stages of operation of the equipment shown in FIG. 1.
  • the equipment shown in FIG. 1 of the drawings includes a feeding device 1 for concrete used as a cementing agent and a feeding device 2 for two-component capsules.
  • the feeding device 1 for concrete comprises a shifting device 4 for a feeding pipe 5.
  • the shifting device is supported by a frame 3 of the bolting equipment.
  • the feeding pipe 5 can move axially as supported on a guide beam 6.
  • a tubular guide 7 forms an extension of the feeding device and a guide pipe 8 is mounted axially slidingly on said guide 7 and terminates diagonally at the side of a nozzle 9.
  • an actuating device 10 is provided, which operates by means of a wire etc., which is displaceable by means of a hydraulic cylinder and which runs over pulleys and is attached to the guide pipe 8 at 11.
  • Concrete 12 is fed into the feeding pipe by means of a pump 13.
  • the feeding device 2 for two-component capsules comprises a feeder pipe 14 forming a guide, whose end extends into the lower end of the nozzle 9 and is displaceable axially through the nozzle. Moreover, the device is provided with a displacing mechanism 22 for shifting the feeder pipe 14 axially through the nozzle 9, whereby the pipe is preferably coaxial with the nozzle.
  • the displacing mechanism may be, e.g., similar to the actuating device 10, or any other suitable mechanism.
  • the pipe 14 is attached to a charging station 15 for the inserting of two-component capsules 16, e.g., one by one, into the feeder pipe 14.
  • the feeder pipe is connected with a mechanical, pneumatic or some other shifting device 17 for feeding the capsule through the feeder pipe into a drill hole 20.
  • a water connection is denoted in the shifting device 17 by means of an arrow.
  • This water connection is not always necessary, but the suggested water connection can be utilized in many ways.
  • the capsule/capsules 16 may be fed into the drill hole by means of water, in which case the water pushes the capsule forwards in the feeder pipe until the capsule is in the drill hole. If necessary, the capsule 16 can in this way be pushed deep into the drill hole if a long feeder pipe is used.
  • the water connection may also be utilized for washing the drill hole. In such a case, water is sprayed into the drill hole through the feeder pipe, which water washes any stone crumbs out of the hole before the capsule is fed into the drill hole.
  • the water connection may also be used for washing the bolting equipment.
  • water is sprayed through the feeder pipe against the rock located above the bolting equipment, whereby the water falls down upon the bolting equipment and washes off the stone dust.
  • the maintenance and cleaning of the equipment can be simplified, while at the same time otaining an improved reliability in operation.
  • the feeder pipe 14 may be either rigid or flexible.
  • the feeding pipe 5 used for feeding the concrete must be made of a relatively elastic material so that it can be inserted in the drill hole without being jammed.
  • the nozzle 9 fitted onto the guide pipe 8 is supported on a shifting plate 18, which is displaceable by means of a hydraulic cylinder 19 relative the frame 3 in the transverse direction of the guide pipe 8.
  • the shifting plate 18 and the hydraulic cylinder 19 are, of course, not necessary for operation of the equipment, but since the drill hole is not always necessarily produced at the point at which the drill rod first reaches contact with the rock, owing to unevenness of the rock face and to other reasons, the shifting place is advantageous because it is now possible to compensate minor divergencies and thereby to guarantee proper feed of cement into the hole.
  • the feeding device 1 for a cement agent is shifted on the frame of the bolting equipment into alignment with the hole so that the nozzle 9 is substantially coaxial with the drill hole (FIG. 2A).
  • the guide pipe 8 is shifted by means of the actuating device 10 towards the rock so that the nozzle 9 becomes positioned at the mouth of the drill hole (FIG. 2B).
  • the feeder pipe 14 is shifted by means of the shifting mechanism 22 through the nozzle 9 preferably right in front of the drill hole 20, whereupon one or several two-component capsules 16 are fed through the feeder pipe 14 into the drill hole (FIG. 2C).
  • the feeder pipe 14 By shifting the feeder pipe 14 beyond the opening 5 of the concrete feeding pipe, collision of the capsules against the edge of the opening with resulting crushing is prevented. If the pipe 14 has been displaced over the entire length of the nozzle, the capsules 16 can be guided reliably to the centre of the drill hole 20, whereby they have ready access into the hole and are not caught at the mouth of the hole. After the capsule 16 has been fed into the hole, the concrete feeding pipe 5 is shifted by means of the shifting device 4 towards the nozzle 9 and further into the drill hole 20. If the capsule/capsules 16 have during feeding stopped in the hole before its bottom, the tip of the feeding pipe 5 pushes the capsule or capsules ahead of it to the bottom of the hole (FIG. 2D).
  • Concrete 22 is fed into the drill hole through the pipe 5 at the same time as the pipe is being pulled outwards in the hole (FIG. 2E).
  • the guide pipe 8 is pulled by means of the actuating device 11 off the mouth of the hole, whereupon the entire feeding device 1 is shifted aside on the frame so that a rock bolt 21 can be pushed into the drill hole (FIG. 2F).
  • the bolt crushes the capsule or capsules 16 so that the initial fixing of the bolt starts immediately and the bolt remains in the hole during the hardening of the concrete. By rotating the bolt, it is possible to ensure a mixing of the two-component agent and, thereby, proper fixing of the bolt.
  • both a capsule 16 containing a rapidly hardening two-component agent and ordinary inexpensive concrete 12 can be fed at the desired ratio mechanically into drill holes 20.
  • the number of capsules 16 is chosen on the basis of the magnitude of the initial load that the bolt 21 has to stand and on the basis of the distance over which a rapid cementing is desirable to be performed.
  • For filling the remaining portion of the hole in the desired way it is possible to use slowly hardening inexpensive concrete or any other suitable material, whose feeding by means of conventional concrete feeding equipment earlier known in the art is easy and simple to combine with the present invention.
  • the entire bolting can be accomplished remote-controlled by means of the method of the invention, which improves the working safety and simplifies the working.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Feeding And Controlling Fuel (AREA)
US06/583,023 1983-04-26 1984-02-23 Method and equipment for performing rock bolting Expired - Lifetime US4576525A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI831423 1983-04-26
FI831423A FI831423L (fi) 1983-04-26 1983-04-26 Foerfarande och apparat foer utfoerande av loedbultning.

Publications (1)

Publication Number Publication Date
US4576525A true US4576525A (en) 1986-03-18

Family

ID=8517107

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/583,023 Expired - Lifetime US4576525A (en) 1983-04-26 1984-02-23 Method and equipment for performing rock bolting

Country Status (10)

Country Link
US (1) US4576525A (sv)
AU (1) AU566573B2 (sv)
CA (1) CA1213743A (sv)
DE (1) DE3410101C2 (sv)
FI (1) FI831423L (sv)
FR (1) FR2545151B1 (sv)
IT (1) IT1175955B (sv)
NO (1) NO162581C (sv)
SE (1) SE459352B (sv)
ZA (1) ZA841519B (sv)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5375947A (en) * 1992-01-23 1994-12-27 Multi Construction Chemicals (Proprietary) Limited Method of filling a borehole
WO1999001641A1 (en) * 1997-07-04 1999-01-14 Industrial Roll Formers Pty. Limited An apparatus for positioning a resin cartridge
US5951208A (en) * 1997-06-13 1999-09-14 J. H. Fletcher & Co., Inc. Roof bolting method and related apparatus
WO2001057362A1 (en) * 2000-02-01 2001-08-09 Fosroc International Limited Capsule feed system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU580259B2 (en) * 1983-04-12 1989-01-12 A.B. Atlas Copco A method of rock bolting,and a device,and a roof bolting apparatus
FR2556771B1 (fr) * 1983-12-16 1986-05-02 Eimco Secoma Tete avant de tourelle ou glissiere d'appareil de foration, permettant l'injection de cartouches de resine
GR920100256A (el) * 1991-07-18 1993-05-24 Mcneil Ppc Inc Μέ?οδος για την παρεμπόδιση αναπτύξεως οσμών των υγρών του σώματος.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4215953A (en) * 1978-08-30 1980-08-05 Envirotech Corporation Device for injecting cartridges of resin for bolting apparatus
US4226559A (en) * 1977-08-31 1980-10-07 Atlas Copco Aktiebolag Rock bolting apparatus
US4229124A (en) * 1979-02-15 1980-10-21 Joy Manufacturing Company Automatic roof bolting system for mines
US4398850A (en) * 1981-02-09 1983-08-16 Copper Range Company Roof bolter and process
US4420277A (en) * 1981-09-18 1983-12-13 Joy Manufacturing Company Mine roof driller-bolter apparatus and method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT315108B (de) * 1972-06-26 1974-05-10 Gd Anker Gmbh & Co Kg Verfahren bzw. Ankerausbau zum Verankern eines Ankerbolzens in einem Bohrloch
DE2410212A1 (de) * 1974-02-19 1975-09-04 Hinteregger Ohg R U A Verschlussvorrichtung fuer kunststoffinjektionen in bohrloecher beim sicherungsverbau sowie unter und ueber tag und verfahren zur herstellung eines verbundverbaus als gebirgssicherung im unter- und uebertagebau
SE7514164L (sv) * 1975-12-15 1977-06-16 Atlas Copco Ab Forfarande och anordning for samtidig inmatning av flera patroner i ett borrhal
GB1538102A (en) * 1976-09-15 1979-01-10 Ici Ltd Calcium sulphate hemihydrate plaster

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226559A (en) * 1977-08-31 1980-10-07 Atlas Copco Aktiebolag Rock bolting apparatus
US4215953A (en) * 1978-08-30 1980-08-05 Envirotech Corporation Device for injecting cartridges of resin for bolting apparatus
US4229124A (en) * 1979-02-15 1980-10-21 Joy Manufacturing Company Automatic roof bolting system for mines
US4398850A (en) * 1981-02-09 1983-08-16 Copper Range Company Roof bolter and process
US4420277A (en) * 1981-09-18 1983-12-13 Joy Manufacturing Company Mine roof driller-bolter apparatus and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5375947A (en) * 1992-01-23 1994-12-27 Multi Construction Chemicals (Proprietary) Limited Method of filling a borehole
AU663550B2 (en) * 1992-01-23 1995-10-12 Multi Construction Chemicals (Proprietary) Limited A method of filling a borehole
US5951208A (en) * 1997-06-13 1999-09-14 J. H. Fletcher & Co., Inc. Roof bolting method and related apparatus
WO1999001641A1 (en) * 1997-07-04 1999-01-14 Industrial Roll Formers Pty. Limited An apparatus for positioning a resin cartridge
WO2001057362A1 (en) * 2000-02-01 2001-08-09 Fosroc International Limited Capsule feed system

Also Published As

Publication number Publication date
SE8402250L (sv) 1984-10-27
SE8402250D0 (sv) 1984-04-25
NO162581B (no) 1989-10-09
NO162581C (no) 1990-01-17
IT1175955B (it) 1987-08-12
FI831423L (fi) 1984-10-27
DE3410101C2 (de) 1986-07-17
AU2661084A (en) 1984-11-01
FI831423A0 (fi) 1983-04-26
AU566573B2 (en) 1987-10-22
DE3410101A1 (de) 1984-10-31
FR2545151A1 (fr) 1984-11-02
ZA841519B (en) 1984-10-31
NO841628L (no) 1984-10-29
IT8419984A0 (it) 1984-03-09
SE459352B (sv) 1989-06-26
CA1213743A (en) 1986-11-12
FR2545151B1 (fr) 1986-12-26

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